When the minority criticizes the mainstream

You should point things out logically with problems and alternatives in mind.
If you criticize just for the sake of criticizing, or slander just for the sake of slandering,
then that is exactly what a "faction without a goal" does.
That is something Jang Dong-hyeok and the People Power Party are quite good at...
Lately, even the Cho Kuk Party seems to be doing that well.